Summary:Mahjong comes from China, yet belong to the whole world. Owing to its comprehensive cultural content as well as it's merits of being interesting, competitive and helpful to wisdom and friendship, it has been enjoyable pastime for people all over the world for nearly a century.There are lots of rules about mahjong. The Standard Competitive Mahjong is an international one:- 81 types of Fan, which score from 1 to 88;- at least 8 fans to win (Hu);- 13 tiles in hands, 14 when Hu.So, we can play this game base on this rule, and:- 10 AI players. different level, different strategy;- 4 Game mode: Compaign, Free play, World Match and Multi-Player;- 21 achievements, 81 fans;This game is suit for those one who want to challenge themselves. if you are, join us!